You have only 2 options
.
1. Go to him and ask him politely that u are disturbed due to his high volume bla bla. You may go to him 2-3 times more if you want to
2. Otherwise, just go to CAPITAL POLICE and ask them for their guidance on this matter
.
Inshallah, that would be the last step to make him lower his music volume and to learn a lesson that "RESPECT & CARE FOR YOUR NEIGHBOURS"